Invisible pipe joint



July 3l, 1923- G. HAIL INVISIBLE PIPE JOINT i'led Dec. 2,

Patented July 3l, 1923.

GUSTAV HAIL, QF PORTLAND, OREGON.

INVIEIBLE PIRE JOINT.

Application led Decembcn, 1921. Serial No. 519,410.

T o all whom it 'may ooacern:

Be it known t .it I, GUs'iAv Heim a citizen of the United States and a resident of Portand, county of Multnoxiiah, and State 5 of Ore on, have invented a certain new and useful 111 I ovement in Invisible Pipe loints, of which the following is a specication.

The object of m invention is to provide an internal, invisib e joint for standard hell l0 and spigot end pipes. In the past-, ipes with internal joints were used which di not conform with the standards set forth in the local ondes or else, standard pipeswere used and the joint was made wit a big ring of 15 binding material wiped on the outside of the pipe.

By my invent-ion I have provided a joint which can bel lilled with a minimum of cement, can be lled very quickly, and in 9 tests has stood all tests required of water conduits and sewer ipes.

The one big disa vantage of wi ing the joint on' the outside is that large dite es have to be dug underneath each joint so that the u 0611181111 CM1. be` packed securely around. and underneath thepipe and the ditch must be left until the pipe is set so that inspection can be readil made.

This not on y caused a eat. deal of labor,

0. a considerable amount of oss of cement, and 'a' vnatural racking whichvthrew the sections of pipe-out of alinement with each other, but also, made a oor oint because the cement would fall o on t e underside of the pipe as it Was held in position merely by its adheson to the pipe.

The attempts at providing double bell end i and straight section pipes naturally sieiot entirely eliminate these difficulties l because the could not be used under the codes used y'the different localities which require that pipe be made with one bell and one spigot end; Theyalso did not make a proper seal because they were not so de 4.5 ed. that the expansion and contraction gillieat could take glace without breaking the gint. Another iilloulty was that each QQQ Qn of pipe did not take the full weight of itself inde de'xitly of tinv other sections l0 'ond frequently the pipes would te'id to slip away from each other when too much wei ht was placed on a single section of pipe. 1

these diiculties I have overcome in the de` vice which I have showny in the .following drawings, in' which:

Fig. 1 is a lon tudinal cross sectional 'I:

View of one type o my invention and the periphery of the joint when the holland spi ot ends of the sections are alined get er;

Fig-2 is across sectional view 'taken on the line 2-2 of Fig. 1v :and is a. view at4 right angles to the view shown inAFigifl and shows the pouring slot and the relation' of the joint filler in relation to the two pipes;

Fig. 3 is a detailed view showing the spigot end of the pipe; Fig. 4 is a detailed cross sectional view showincr another adaption o finjfnvention i111 vilhlidli the type of 4joint liasifbee'ii changed s i t i u i I" Figy is a detailed view'sliowing' tire bell the le'i'i'ds of end separately;

Fig. 6 is a detailed cross sectiona levi? showing another adaption of my'invexftion; Fig. 7 is `a detai ed view showingftlie spigot end of the joint shown in Fig. 6; 'nd Fig.r8 is a. detailed cross sectionalview showing a pouring` end ooutletholes to be used when the cement is to |be forced in by means of a pump.

In the joint shown inFig'. lthebell end a is made with a pourin'g'slot b,andwi`th ajwed shaped notch e. f The 'spigot end d is'ma e with a shoulder e and with a taeredprojection f and when. the spigot and) is placed in the bell end andthe binder gispoured, the joint resembles thee'cross sectional view shown in Fig. 1. Fi 4 is a slight change over Fig. 1, inasmuc as a channel Ithas been provided. It has been cut away and leaving shoulders, and the spigot end hasV been slightly tapered away on the inside also leaving an inside bevel z' which allows for a greater contactl of binder with the pipe so that a greater adhesion will take place.

In Fig. 6 a slightly tapered channel li. has been providedand on the inside of the bell end c has been made square instead of wedge shaped as notch c in the original ,arranges-` ment. This leaves a projection j in the bell end a. The spigot end is made with a. taper.

as before but two declivities k and Z ar'e made and a straight section m is added to extend underneath the projection It can be seen that the cement flowing into these declivities will tend to hold the weight of each section separately and a longitudinal strain due to contraction and expansion will cause the break to come between the point n and the point o. In the other variations of my invention the break will come on similai` points n and o' so that an hair line crack which will come, due to t is elongation and contraction of the pipe will not break the joint, but will merely cause the crack inside the joint where no harm will be done. i

One method of forcing the cement into this internal joint is by means of a Iforce In Fig. 8 I have shown a means to j ol is with pe' ofont. The tube of the the mg ty Bum can e inserte in thehole p and qui.; binder can be forced aro nd until if gws out of the hole q which can bethen ,gngged and further rassure applied so that his peinent will be' orced into every crack allof my experiments I have found Bie cement bein allowed to set will ,l unite with e ipe to form into l mass and t us the joint is :than the pi itself. The declivties whic I have note in the different types of in invention hold the pipe against any lo iidinal slipping of the pipe and thus to remove one pipe rom the other after the binder has set requires a shearing action of `the binder to release-the joint.

These pipes can be manufactured by all standard molds and .machinery and do not 'nire 'al tools because 0f their general stan ard sizes and contours, andit-hus are ada table to be manufactured by any plant. is th e one big feature over other t of pipe which use an internal joint and vthat my pipe can be' used for irrigation and pressure work, as I have tested them out against pressure greater than eighty pounds to the square inch internal pressure without affecting the joint in the least- Altho I have not indicated reinforcing material in my' pipes it is to be understood that this can readi be done as my pipes are especially design to facilitate this. The materials used for making the pipes can be any of the standard materials such as concrete, clay, Wood or iron, or any other such substance. .4 The illustrations and descriptions abov given are merely intended to show aprectical mode of construction of my device. The articular details of construction above described are, however, variable to suit. the ideas of the manufacturer providing such variations retain the essential features ot m invention. claim: l. I In a conduit made in sections, the endpof onesection being tapered and then extended coaxially with the bodyl portion of said section, the tapered portion beinggfo'rmed with annular grooves, the end of theop osite section being enlarged and frfovied with a receiving recess greater inv meter than the maximum diameter of the adj acent lsection and adapted to receive tlievtapered portion thereof, the end' wall of the recess forming an abutment for the end of theiadjacent tapered section and having an annular flange which overlies and is spaced; from" the extended portion of said adjacent section, the enlarged portion of the section having a filling opening and Vsealing materiali; in the' cavity formed between the tapered end and the enlarged end of the two sections to seal and hold the two seetions together. 

